Letters, Numbers, Punctuation
| Character | Code | Character | Code | Character | Code | Character | Code | Character | Code | Character | Code |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | · – | J | · – – – | S | · · · | 1 | · – – – – | Period | · – · – · – | Colon | – – – · · · |
| B | – · · · | K | – · – | T | – | 2 | · · – – – | Comma | – – · · – – | Semicolon | – · – · – · |
| C | – · – · | L | · – · · | U | · · – | 3 | · · · – – | Question mark | · · – – · · | Double dash | – · · · – |
| D | – · · | M | – – | V | · · · – | 4 | · · · · – | Apostrophe | · – – – – · | Plus | · – · – · |
| E | · | N | – · | W | · – – | 5 | · · · · · | Exclamation mark | – · – · – – | Hyphen, Minus | – · · · · – |
| F | · · – · | O | – – – | X | – · · – | 6 | – · · · · | Slash, Fraction bar | – · · – · | Underscore | · · – – · – |
| G | – – · | P | · – – · | Y | – · – – | 7 | – – · · · | Parenthesis open | – · – – · | Quotation mark | · – · · – · |
| H | · · · · | Q | – – · – | Z | – – · · | 8 | – – – · · | Parenthesis closed | – · – – · – | Dollar sign | · · · – · · – |
| I | · · | R | · – · | 0 | – – – – – | 9 | – – – – · | Ampersand, Wait | · – · · · | At sign | · – – · – · (=A+C, see below) |
There is no standard representation for the exclamation mark (!), although the KW digraph (– · – · – –) was proposed in the 1980s by the Heathkit Company (a vendor of assembly kits for amateur radio equipment). While Morse code translation software prefers this version, on-air use is not yet universal as some amateur radio operators in Canada and the USA continue to prefer the older MN digraph (– – – ·) carried over from American landline telegraphy code.
The &, $ and _ signs are not defined inside the ITU recommendation on Morse code. The $ sign code was represented in the Phillips Code, a huge collection of abbreviations used on land line telegraphy, as SX. The representation of the & sign given above, often shown as AS, is also the Morse prosign for wait. In addition, the American landline representation of an ampersand was similar to "ES" (· · · ·) and hams have carried over this usage as a synonym for "and" (WX HR COLD ES RAINY, "the weather here is cold & rainy").
On May 24, 2004 — the 160th anniversary of the first public Morse telegraph transmission — the Radiocommunication Bureau of the International Telecommunication Union (ITU-R) formally added the @ ("commercial at" or "commat") character to the official Morse character set, using the sequence denoted by the AC digraph (· – – · – ·). This sequence was reportedly chosen to represent "A C" or a letter "a" inside a swirl represented by a "C". The new character facilitates sending email addresses by Morse code and is notable since it is the first official addition to the Morse set of characters since World War I.
Read more about this topic: Morse Code